LG 55UL3E-B.AEK Owner's Manual page 12

Abnormal display
• If the product feels cold to the touch, there may be a small "flicker"
when it is turned on. This is normal, there is nothing wrong with
product.
• This panel is an advanced product that contains millions of pixels.
You may see tiny black dots and/or brightly coloured dots (red, blue
or green) at a size of 1 ppm on the panel. This does not indicate a
malfunction and does not affect the performance and reliability of
the product. This phenomenon also occurs in third-party products
and is not subject to exchange or refund.
• You may find different brightness and color of the panel depending
on your viewing position(left/right/top/down).
This phenomenon occurs due to the characteristic of the panel. It is
not related with the product performance, and it is not malfunction.
• Displaying a still image for a prolonged period of time may cause
image sticking. Avoid displaying a fixed image on the monitor screen
for a long period of time.
12
Generated sound
• "Cracking" noise: A cracking noise that occurs when watching or
turning off the monitor is generated by plastic thermal contraction
due to temperature and humidity. This noise is common for products
where thermal deformation is required.
• Electrical circuit humming/panel buzzing: A low level noise is
generated from a high-speed switching circuit, which supplies a large
amount of current to operate a product. It varies depending on the
product. This generated sound does not affect the performance and
reliability of the product.
• When cleaning the product, be careful not to allow any
liquid or foreign objects to enter the gap between the
upper, left or right side of the panel and the guide panel.
(Depending on model)
• Make sure to wring any excess water or cleaner from the
cloth.
• Do not spray water or cleaner directly onto the monitor
screen.
• Make sure to spray just enough of water or cleaner onto a
dry cloth to wipe the screen.